Radio Transmitter Board, High Frequency Oscillation Short Low Power Sound Amplification SW Radio Amplifier Kit for DIY Campus Broadcast

Description

• Application: This is a short transmitter, mainly used in short radio experiments and tests, understand the principle of modulation.
• Structure: Mainly consists of power input, sound amplification, sound modulation, 21MHZ high frequency oscillation, Class C high frequency amplification, 21MHZ low pass filter.
• Power Input: Professional radio transmitter board, C1 to C6 for the filter capacitors, reduce the power supply interference ripples.
• Sound Modulation: Transformer B1 secondary inductance sound voltage superimposed on the DC power, to get the modulation voltage with the change of the sound source.
• High Frequency Oscillation: 21MHZ high frequency oscillation, crystal Y1 in the circuit is a parallel resonance, equivalent to the inductor.

Spec:
Item Type: AM Radio Transmitter Board
Material: PCB
Power Supply: Voltage DC Power Supply 9V2A; The Whole Current 50 to 80mA
Frequency: 21MHZ Crystal Frequency Stabilization
Adjustment Amplitude: 45%
High Frequency Power: 100mW
Modulation: Transformer High Potential Modulation
Sound Source: External Sound Source, Available Cell Phones, MP3, Computers, etc.
Transmitting Distance: Better Than 10m/32.8ft
Production Difficulty: Welding, Without Debugging
Applicable: Radio Enthusiasts, Students Experimental Testing

PackageList:
1 x AM Radio Transmitter Board
1 x Screw Package
1 x Instruction Manual
1 x Sound Cable
1 x Antenna

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